Type-writing machine.



G. A. SEIB.

TYPE WRITING MACHINE.

APPLICATION men 0Ec.31,1915

Patented Oct. 81, 1916.

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UNITED STATES PATENT cr mes.

GEORGE A. SEIB, OF ILION, NEW YORK, ASSIGNOR TO REMINGTON TYPEWRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Oct. 31. 1916.

Application filed December 31, 1915. Serial No. 89,601.

T 0 all whom it may concern:

Be it known that I, GEORGE A. SEIB, citizen of the United States, and resident of Ilion, in the county of Herkimer and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My present invention relates more particularly to stop devices for case-shifting typewritin machines and its main object is to minimize or reduce the noise incident'to such case-shifting.

To the above and other ends my invention consists in thefeatures of construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

While my invention is applicable to various typewriting machines, the preferred construction herein illustrated is embodied in a stop mechanism of the general character disclosed in the patent to Merritt No. 871,781, granted December 21, 1907 wherein such mechanism is employed to arrest and determine the movements of the shiftable type bar segment of the Monarch typewriting machine.

In the accompanying drawing, Figure 1 is a fragmentary front elevation of the shiftable type bar segment of a typewriting machine, together' with the supporting and guiding posts or uprights and associate parts, my improved stop devices being mounted on said posts. Fig. 2 is a fragmentary rear elevation of some of the parts shown in Fig. 1, the segment, however being represented in shifted position. Fig. 3 is a perspective view of one of the posts and associate parts. Fig. 4 is a horizontal sectional view taken on a plane indicated by the dotted line aam in Fig. 1 and looking downward. Fig. 5 shows a modified stop device.

The main frame of the machine comprises a base portion 1 from the sides of which rise stationary posts or uprights 2 that assist to support and guide the shiftable or movable type bar segment 3 that is controlled by key operated devices including arms or links 4. In the present construction the segment when in its upper position as shown in Fig. 1 is adapted to write lower case characters and when shifted downward to its lower position as in Fig. 2 is adapted to write upper case characters. But the direction of shift from one case position to the other may be reversed, as it is in the present Monarch. Fixed to the posts 2 are grooved track-ways 5, oppositely grooved track-ways 6 being fixed to the segment 3. Sets of anti-friction balls 7 are arranged in the associate track ways and furnish bearings for the shiftable segment 3, each set of balls being provided with a separator 8 interposed between the track-ways 5 and 6.

The up and down shifting movements of the segment 3- along the fixed guiding and supporting devices 2, 5 are limited by stop devices comprising at each side of the segment an upper lug or stop 9 and a lower lug or stop 10 both fixed to and projecting rearward from the back of. the segment. Each pair ofstops 9 and 10 cooperate with stop devices of novel construction adjustably secured in pairs to the rear faces of the posts 2. The novel stop devices 11 and 12 comprised in each pair are essentially alike. Each of said stop devices is in the form of a split plate or arm horizontally arranged and slidably fitted into a groove in the back of the post or stationary part Headed screws 13 pass through slots 14 in the body of the stops lland 12 and are threaded into the posts, said screws adjustably securing the stops to the posts and the slots 14 permitting the stops to be adjusted horizontally inward and outward to vary the point of arrest of the segment. The inner end portion of each of the stop devices or plates 11 and 12 is formed with a slot or kerf 15 preferably terminating at 16. The slots 15 divide the stopping end of each of the devices 11 and 12 into tongues 17 and 18. The stopping'ends of the stops 9 and 10 are preferably oppositely beveled and the cooperating end portions of the stops 11 and 12 are correspondingly beveled or inclined in opposite directions as indicated at 19. The tongues 17 with which the stops 9 and-10 directly engage have slightly divergent sides, said tongues being somewhat thinner or narrower near their free ends than farther back toward their roots. In other words. the tongues 17 are slightly wedge-shaped. These tongues or stops proper are so constructed that while they cooperate with the stops 9 and 10 positively to arrest the segment 3 and limit its movements in both directions, they, nevertheless, are sutficiently yielding to premade centrally of the body or shank of the plate 11 or 12, as shown at 15- in Fig. 5.

The stops of my invention have been embodied in full-sized operative tvpewriting machines, and their use has demonstrated in practical operation that the shifting of the segment from one caseposition to the other is made with vastly less noise or sound than with the use of the solid stops heretofore employed.

It will be observed that by my present invention I provide novel stop devices for limiting the movement between the two relatively movable parts, viz., the type bar segment and the guide post or pair of guide posts, the relative movement between the parts being caused by shifting the segment; that said stop devices comprise a split stop which, in the present instance, is a plate-like part having a kerf or out that forms two tongues, one of the tongues being slightly wedge-shaped and cooperating with a stop lug or projection, or 10; and that said stop devices also comprise two tongues or members arranged one under the other close together but out of contact.

Various changes in detail construction and arrangement may be made without departing from the spirit of my invention.

What I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combination of two relatively movable parts, and stop devices for limiting relative movement between said parts, said stop devices comprising a pair of closely arranged substantially parallel tongues, one of said tongues only being adapted for contact with a coacting stop device.

2. In a typewriting machine, the combination of two relatively movable parts, and stop devices for limiting relative movement between said parts, said stop devices comprising a lug and also two tongues, the lug being adapted to contact with one only of said tongues.

3. In a typewriting machine, the combination of two. relatively movable parts,

' and stop devices for limiting relative movement between said parts, said stop deoperating split stop on the other part, said split stop being adjustable tovary the point of arrest of said segment, said split stop consisting of a pair of closely arranged substantially parallel tongues, one only of said tongues being adapted for contact with said stop lug.

5. In a typewriting machine, the combination with a shiftable segment, of means for arresting the same comprising an integral device consisting of two tongues or members arranged close together but out of contact.

6. In a typewriting machine, the combination with a shiftable segment, of means for arresting the same comprising a one-piece device consisting of two tongues one under the other but slightly spaced apart.

7. In a typewriting machine, the combination with a shiftable segment having contact devices, of segment stops comprising slide bars formed each with a pair of spaced tongues, the said slide bars being so arranged that only one tongue of each pair of tongues is struck by one of the contact devices on the shiftable segment.

8. In a typewriting machine, the combination of an up and down shiftable segment provided with stopping devices, and a pair of split stops fixedly arranged transversely of said stopping devices on said segment to cooperate with said stopping devices.

9. In a typewriting machine, the combination of two relatively movable parts, two split stops on one of said parts, and two coacting stops on the other of said parts, one of said split stops cooperating with one of said co-acting stops to limit the movable part in one direction and the other of said split stops cooperating with the other Cuacting stop to limit the movement of said movable part in the opposite direction.

Signed at Ilion, in the county of I-Ierkimer and State of New York, this 29th day of December, A. D. 1915.

GEORGE A. SEIB.

Witnesses:

WILLIAM H. HURLEY, CLARENCE M. SLAWSON.' 

